For those that have used for Schwab and ETrade recently for options, how does the execution (fill quality) compare? My use case is 100% limit orders at mid, usually on less liquid, further OTM options, but S&P500 single names. Which broker will provide the best fills? A while ago, it was Schwab by a long shot, but ETrade recently introduced an API and I'm curious if they have become more competitive in regards to fill quality. I don't care about the platform, will use 100% API.